Groundsel bush (seepwillow, Baccharis halimifolia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek ParkLick Creek: Background Notes. College Station, Texas

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College Station - Sam Houston Forest, Texas, September 27 - October 1, 2024

Album 3626: College Station - Sam Houston Forest, Texas, September 27 - October 1, 2024

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The image presents a comparative analysis of groundsel bush flowers under two different lighting conditions: natural daylight and UV-A blacklight illumination.

**Image Composition**

* The top half of the image showcases the flowers illuminated by regular daylight.
* The bottom half displays the same flowers exposed to 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park, College Station, Texas.

**Flower Characteristics**

* Both images capture the groundsel bush in full bloom.
* Each flower is composed of numerous tiny white petals and a yellow center.
* The flowers are densely packed on long stems, forming a lush cluster at the top.

**Lighting Effect**

* Under regular daylight, the flowers appear pale and unremarkable.
* In contrast, when exposed to UV-A blacklight, the flowers display vibrant blue coloration in the centers and greenish-blue hues along the stem.

**Background**

* The background of both images is a solid black surface, providing a clean and neutral backdrop for the flower comparison.

**Overall Impression**

The image effectively highlights the striking difference between regular daylight and UV-A blacklight illumination on groundsel bush flowers. While they may appear unremarkable in natural light, their true beauty is revealed when exposed to UV-A radiation. – AI vision

🇪🇸 Descripción en español / Spanish Description

El arbusto Groundsel (seepwillow, Baccharis halimifolia) cuando se expone a la luz diurna regular, así como cuando se ilumina con una luz negra ultravioleta de 365 nm (UV-A) del Parque Lick Creek. College Station, Texas, 1 de octubre de 2024. La imagen presenta un análisis comparativo de las flores del arbusto Groundsel bajo dos condiciones de iluminación diferentes: luz diurna natural e iluminación con luz negra ultravioleta de 365 nm. **Composición de la imagen** * La mitad superior de la imagen muestra las flores iluminadas por la luz diurna regular. * La mitad inferior presenta las mismas flores expuestas a una luz negra ultravioleta de 365 nm del Parque Lick Creek, College Station, Texas. **Características de las flores** * Ambas imágenes capturan el arbusto Groundsel en plena floración. * Cada una de ellas consta de numerosas y diminutas pétalos blancos y un centro amarillo. * Los tallos están densamente poblados de flores, formando un grueso racimo en la parte superior. **Efecto de la iluminación** * Bajo la luz diurna regular, las flores parecen pálidas e insignificantes. * Por el contrario, cuando se exponen a una luz negra ultravioleta de 365 nm, las flores presentan un color azul vibrante en el centro y tonos azul verdoso a lo largo del tallo. **Antecedentes** * El fondo de ambas imágenes es una superficie negra sólida, que proporciona un contexto limpio y neutro para la comparación de las flores. **Impresión general** La imagen pone en evidencia la diferencia sorprendente entre la luz diurna regular y la iluminación con luz negra ultravioleta de 365 nm en las flores del arbusto Groundsel. Aunque pueden parecer insignificantes a simple vista, su verdadera belleza se revela cuando se exponen a radiación UV-A. – Spanish translation

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